The Ninth Circuit has determined that a woman seeking asylum based on domestic violence demonstrated a government unwillingness to protect her and government acquiescence to torture of her when the police accepted a bribe from her abuser and left without speaking to or assisting her. The court did not reach the issue of whether the petitioner had established a cognizable particular social group.
The full text of Davila v. Barr can be found here:
https://cdn.ca9.uscourts.gov/datastore/opinions/2020/08/07/17-72173.pdf